TABLE 1

Characteristics of patients admitted with exacerbated COPD

Sex
 Male10 865 (67.8)
Smoking status n=15 181
 Current smoker5012 (31.3)
 Ex-smoker9317 (58.2)
 Never-smoker852 (5.3)
Age years
 Total70.8±10.8
 Male71.4±10.4
 Female69.5±11.3
BMI kg·m−2 n=9011
 Total26.6±6.5
 Male26.6±5.9
 Female26.7±7.5
Symptoms on admission
 Dyspnoea increase15 409 (96.2)
 Sputum increase10 373 (64.8)
 Sputum colour change8134 (50.8)
Previous admissions during the past 12 months n=14 641
 06907 (47.2)
 13498 (23.9)
 >14236 (28.9)
FEV1 % predicted n=795844.0±17.5
GOLD stage in spirometry-proven COPD n=7958
 I195 (2.4)
 II2175 (26.5)
 III3737 (45.5)
 IV2098 (25.6)
Blood gas analysis
 pH n=13 041
  >7.3510 589 (81.2)
  7.25–7.351921 (14.7)
  <7.25531 (4.1)
PaCO2 kPa n=13 069
  >65933 (45.4)
  >82164 (16.6)
Ventilatory support n=15 496
 No ventilatory support13 142 (84.8)
 Only NIV2068 (13.3)
 Only IV219 (1.4)
 NIV and IV67 (0.4)
Radiography n=15 765
 Normal3555 (22.2)
 Any pathology12 212 (76.2)
Medication on admission n=16 016
 Systemic corticosteroids13 187 (82.3)
 Antibiotics13 773 (86.0)
  • Data are presented as mean±sd or n (%). N=16 016. COPD: chronic obstructive pulmonary disease; BMI: body mass index; FEV1: forced expiratory volume in 1 s; GOLD: Global Initiative for Chronic Obstructive Lung Disease; PaCO2; arterial carbon dioxide tension; NIV: noninvasive ventilation; IV: invasive ventilation.